J/AJ/132/999ivo://CDS.VizieR/J/AJ/132/999doi:10.26093/cds/vizier.51320999CDSOguri M.Inada N.Pindor B.Strauss M.A.Richards G.T.Hennawi J.F.,Turner E.L.Lupton R.H.Schneider D.P.Fukugita M.Brinkmann J.2017-10-12T13:00:06Z2008-07-09T09:28:16ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frquasarsgravitational-lensingWe present an algorithm for selecting a uniform sample of gravitationally lensed quasar candidates from low-redshift (0.6<z<2.2) quasars brighter than i=19.1 that have been spectroscopically identified in the Sloan Digital Sky Survey (SDSS). Our algorithm uses morphological and color selections that are intended to identify small- and large-separation lenses, respectively. Our selection algorithm only relies on parameters that the SDSS standard image processing pipeline generates, allowing easy and fast selection of lens candidates. The algorithm has been tested against simulated SDSS images, which adopt distributions of field and quasar parameters taken from the real SDSS data as input. Furthermore, we take differential reddening into account. We find that our selection algorithm is almost complete down to separations of 1" and flux ratios of 10^-0.5^.2006AJ....132..999Ohttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/132/999CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/A+A/340/371 : Quasar polarization (Hutsemekers+ 1998)J/ApJ/409/28 : Gravitationally Lensed Quasars (Maoz + 1993)http://www.sdss.org : SDSS Home Pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/132/999https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/132/999http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/132/999https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/132/999https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/132/999http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/132/999GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/132/999/table2 (Quadruply lensed quasars used in the simulation)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/132/999/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/132/999/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/132/999/table2?GETtext/xml+votable180.050000true169.57063337.76616390.0055555555555555566/2820 4124 5733 6926 8707 8912 9757 10743 11424 11667 19216 22581 23339 25480 27127 27318 36427 43947 47424 47434https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/132/999?format=asciiOpticaldefaultJ/AJ/132/999/table1Completeness for double lensesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlog(Fratio)Log (base 10) of the flux ratiophot.flux;arith.ratiofloatSepImage Separationarcsecpos.angDistancefloatCtot]0/1[ Total Completenessmeta.notefloatCmor]0/1[ Completeness for morphological selectionmeta.notefloatCcol[0/1[ Completeness for color selectionmeta.notefloatCboth[0/0.3[ The fraction of lenses selected from both morphological and color selectionsmeta.notefloatJ/AJ/132/999/table2Quadruply lensed quasars used in the simulationrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of the quadruple lensesmeta.id;meta.maincharprimaryTypeType, based on visual inspectionsrc.classcharSepMaximum separation between multiple imagesarcsecpos.angDistancefloatfquadFlux ratio between the brightest image and the image farthest from the brightest imagephot.flux;arith.ratiofloatRefReference (1)meta.ref;pos.framecharSNameSimbad namemeta.idcharSDSSSDSS: Display the SDSS datameta.ref.urlcharSimbadSimbad column added by the CDScharNEDSimbad column added by the CDSchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/AJ/132/999/table3Completeness for quadruple lensesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameName of quadruple lensesmeta.id;meta.maincharSepImage Separationarcsecpos.angDistancefloatCtot]0/1[ Total Completenessmeta.notefloatCmor]0/1[ Completeness for morphological selectionmeta.notefloatCcol[0/1[ Completeness for color selectionmeta.notefloatCboth[0/1[ The fraction of lenses selected from both morphological and color selectionsmeta.notefloat